From 7 to 10 September 2017, a host of places and spaces – many of which are usually off limits – will be free for visitors to explore.

It’s a once-a-year chance to discover the often hidden or forgotten gems on our doorsteps and enjoy a wide range of tours, events and activities that help bring local history and culture to life.

The event, established in 1994, is managed by the National Trust, and involves more than 5,000 events and some 40,000 volunteers who between them manage the opening of thousands of individual sites and welcome millions of visitors.

Unfortunately, you've now missed your opportunity to explore our 'Memory Box' exhibition at the Old Post Office, home to NBS in Newcastle-Upon-Tyne but there's plenty more to see and do across the remaining days of this year's event.

In the final part of our series we ask 'Where are people going to live in the years ahead?' and look at a range of different materials, innovative designs, and unique approaches to community that just might be part of a wider solution.